Fix build of lldb on Mavericks after svn rev.243511

[dawn]

Summary

This patch adds a test for ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED around the code which requires 10.10 support to link. Without this, lldb gets unresolved references to _csr_check and _rootless_allows_task_for_pid. This patch resolves http://reviews.llvm.org/rL243511.

[jasonmolenda]

Looks good. I suspected this wouldn't link on older systems.

tools/debugserver/source/RNBRemote.cpp

 
 extern void ASLLogCallback(void *baton, uint32_t flags, const char *format, va_list args);
 
-#if defined (__APPLE__)
+#if defined (__APPLE__) && (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101000)
 // from System.framework/Versions/B/PrivateHeaders/sys/codesign.h
 extern "C" {
 #define CS_OPS_STATUS           0       /* return status */

             else
                 m_ctx.LaunchStatus().SetErrorString("attach failed");
 
-#if defined (__APPLE__)
+#if defined (__APPLE__) && (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101000)
             if (pid_attaching_to == INVALID_NUB_PROCESS && !attach_name.empty())
             {
                 pid_attaching_to = DNBProcessGetPIDByName (attach_name.c_str());